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Manufacturing method and application of high-performance ZnV2O4/mesoporous carbon composite material

A composite material and mesoporous carbon technology, applied in the field of battery materials, can solve the problems of unsafe carbon materials and low capacity, and achieve the effect of low cost, high specific capacity and good reproducibility

Inactive Publication Date: 2013-02-27
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Their capacity is not high, and they have certain defects, such as severe metal lithium SEI film, unsafe carbon materials, Li4Ti5O12 sub> flatulence phenomenon
With the rise of mesoporous composite materials, mesoporous carbon composite metal oxides are considered to be a promising cathode material. According to existing literature reports, their specific capacities are generally between 500-700 mAh / g, At present, there are no related patent reports on the preparation of ZnV2O4-mesoporous carbon composites

Method used

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  • Manufacturing method and application of high-performance ZnV2O4/mesoporous carbon composite material
  • Manufacturing method and application of high-performance ZnV2O4/mesoporous carbon composite material
  • Manufacturing method and application of high-performance ZnV2O4/mesoporous carbon composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] First, the mesoporous carbon was refluxed with concentrated nitric acid at 70°C for 1 hour. Add zinc nitrate powder and ammonium metavanadate powder into the reactor at a molar ratio of 1:2, add an appropriate amount of deionized water, stir with a magnetic stirrer for 30 minutes, then add acid-treated mesoporous carbon, stir, and sonicate for 15 minutes , drying at 60°C for 6 hours. The resulting powder was then placed in N 2 Calcined at 600°C for 5 hours in an atmosphere tube furnace to obtain ZnV 2 o 4 - Mesoporous carbon composites. Lithium battery assembly: ZnV by mass ratio 2 o 4 - Mesoporous carbon composite: polytetrafluoroethylene: acetylene black = 80:10:10 mixed and ground and evenly coated on the copper grid as the negative electrode, the reference electrode and the counter electrode are metal lithium, and the electrolyte is made of 1M LiClO 4 EC+DMC (EC / DMC=1 / 1 v / v) solution. All assembly takes place in the glove box.

Embodiment 2

[0020] First, the mesoporous carbon was refluxed with concentrated nitric acid at 60°C for 2 hours. Add zinc nitrate powder and ammonium metavanadate powder into the reactor at a molar ratio of 1:1, add an appropriate amount of deionized water, stir with a magnetic stirrer for 20 minutes, then add acid-treated mesoporous carbon, stir, and sonicate for 10 minutes , 50 ℃ drying for 7 hours. The resulting powder was then placed in N 2 Calcined at 500°C for 6 hours in an atmosphere tube furnace to obtain ZnV 2 o 4 - Mesoporous carbon composites. Lithium battery assembly: ZnV by mass ratio 2 o 4 - Mesoporous carbon composite: polytetrafluoroethylene: acetylene black = 80:10:10 mixed and ground and evenly coated on the copper grid as the negative electrode, the reference electrode and the counter electrode are metal lithium, and the electrolyte is made of 1M LiClO 4 EC+DMC (EC / DMC=1 / 1 v / v) solution. All assembly takes place in the glove box.

Embodiment 3

[0022] First, the mesoporous carbon was refluxed with concentrated nitric acid at 80°C for 0.5 hours. Add zinc nitrate powder and ammonium metavanadate powder into the reactor at a molar ratio of 1:3, add an appropriate amount of deionized water, stir with a magnetic stirrer for 40 minutes, then add acid-treated mesoporous carbon, stir, and sonicate for 20 minutes , drying at 70°C for 5 hours. The resulting powder was then placed in N 2 Calcined at 700°C for 4 hours in an atmosphere tube furnace to obtain ZnV 2 o 4 - Mesoporous carbon composites. Lithium battery assembly: ZnV by mass ratio 2 o 4 - Mesoporous carbon composite: polytetrafluoroethylene: acetylene black = 80:10:10 mixed and ground and evenly coated on the copper grid as the negative electrode, the reference electrode and the counter electrode are metal lithium, and the electrolyte is made of 1M LiClO 4 EC+DMC (EC / DMC=1 / 1 v / v) solution. All assembly takes place in the glove box.

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Abstract

The invention discloses manufacturing method and application of a high-performance ZnV2O4 / mesoporous carbon composite material, wherein the method comprises the following steps: backwards flowing mesoporous carbon by concentrated nitric acid under the temperature of 60-80 DEG C for 0.5-2 hours; adding zinc nitrate and ammonium metavanadate according to molar ratio of 1:1-3 into a reactor, adding deionized water, stirring for 30min by a magnetic stirrer, then adding the mesoporous carbon, continuously stirring for 10-20min, conducting ultrasound for 10-20min, and drying for 4-8 hours under thetemperature of 50-70 DEG C; and calcining powder in a pipe-type furnace in an N2 atmosphere pipe type furnace for 4-6 hours under the temperature of 500-700 DEG C, thus obtaining the ZnV2O4 / mesoporous carbon composite material. In the invention, the process is simple, the cost is low, the energy consumption is low, the repeatability is good, the mass production can be realized, and the environmental requirement can be met.

Description

technical field [0001] The invention belongs to the field of battery materials, and more specifically relates to a high-performance ZnV 2 o 4 / Preparation method and application of mesoporous carbon composites. Background technique [0002] Since the successful development of lithium batteries in the last century, lithium batteries have been widely used, but it has always been the research focus of scientists to obtain anode materials for lithium batteries with good cycle performance, high specific capacity, and good high-current charging and discharging performance. Now the commonly used negative electrode materials in industry include metallic lithium, carbon materials, Li 4 Ti 5 o 12 wait. Their capacities are not high, and they have certain defects, such as severe metal lithium SEI film, unsafe factors of carbon materials, Li 4 Ti 5 o 12 Flatulence. With the rise of mesoporous composite materials, mesoporous carbon composite metal oxides are considered to be a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/139H01M4/36
CPCY02E60/122Y02E60/10
Inventor 魏明灯曾令兴肖富玉
Owner FUZHOU UNIV